It may be a small modification to the code I provided for dice's coefficient is what you are after. Consider: (note the two lines with the trailing ##)

use strict;
use warnings;
use List::Compare;

my @words = qw(dictate world mamal zezl);
my %dict;

# Build a lookup for the dictionary words
while (defined (my $word = <DATA>)) {
    chomp $word;
    next unless length $word;
    
    my %dup;
    my @bigrams = grep {! $dup{$_}++} $word =~ /(..)/g; ##
   
    next unless @bigrams;
    $dict{$word} = \@bigrams;
}

# Process the given words
for my $word (@words) {
    my %dup;
    my @bigrams = grep {! $dup{$_}++} $word =~ /(..)/g; ##

    next unless @bigrams;

    for my $dictWord (keys %dict) {
        my $lc = List::Compare->new($dict{$dictWord}, \@bigrams);
        my @common = $lc->get_intersection ();
        my $diceCoef = 2 * @common / (@bigrams + @{$dict{$dictWord}});
       
        next unless $diceCoef;
        print "Dice coefficient for '$word' and '$dictWord' is $diceCo
+ef\n";
    }
}


__DATA__
words
zezezl
[download]

Prints:

Dice coefficient for 'world' and 'words' is 0.5
Dice coefficient for 'zezl' and 'zezezl' is 1
[download]